func (self *NsqdCoordinator) SetChannelConsumeOffsetToCluster(ch *nsqd.Channel, queueOffset int64, cnt int64, force bool) error {
	topicName := ch.GetTopicName()
	partition := ch.GetTopicPart()
	coord, checkErr := self.getTopicCoord(topicName, partition)
	if checkErr != nil {
		return checkErr.ToErrorType()
	}

	var syncOffset ChannelConsumerOffset
	syncOffset.AllowBackward = true
	syncOffset.VCnt = cnt
	syncOffset.VOffset = queueOffset

	doLocalWrite := func(d *coordData) *CoordErr {
		err := ch.SetConsumeOffset(nsqd.BackendOffset(queueOffset), cnt, force)
		if err != nil {
			if err != nsqd.ErrSetConsumeOffsetNotFirstClient {
				coordLog.Infof("failed to set the consume offset: %v, err:%v", queueOffset, err)
				return &CoordErr{err.Error(), RpcNoErr, CoordLocalErr}
			}
			coordLog.Debugf("the consume offset: %v can only be set by the first client", queueOffset)
			return ErrLocalSetChannelOffsetNotFirstClient
		}
		return nil
	}
	doLocalExit := func(err *CoordErr) {}
	doLocalCommit := func() error {
		return nil
	}
	doLocalRollback := func() {}
	doRefresh := func(d *coordData) *CoordErr {
		return nil
	}
	doSlaveSync := func(c *NsqdRpcClient, nodeID string, tcData *coordData) *CoordErr {
		if ch.IsEphemeral() {
			return nil
		}
		rpcErr := c.UpdateChannelOffset(&tcData.topicLeaderSession, &tcData.topicInfo, ch.GetName(), syncOffset)
		if rpcErr != nil {
			coordLog.Infof("sync channel(%v) offset to replica %v failed: %v, offset: %v", ch.GetName(),
				nodeID, rpcErr, syncOffset)
		}
		return rpcErr
	}
	handleSyncResult := func(successNum int, tcData *coordData) bool {
		if successNum == len(tcData.topicInfo.ISR) {
			return true
		}
		return false
	}
	clusterErr := self.doSyncOpToCluster(false, coord, doLocalWrite, doLocalExit, doLocalCommit, doLocalRollback,
		doRefresh, doSlaveSync, handleSyncResult)
	if clusterErr != nil {
		return clusterErr.ToErrorType()
	}
	return nil
}
Exemplo n.º 2
0
func (c *context) SetChannelOffset(ch *nsqd.Channel, startFrom *ConsumeOffset, force bool) (int64, int64, error) {
	var l *consistence.CommitLogData
	var queueOffset int64
	cnt := int64(0)
	var err error
	if startFrom.OffsetType == offsetTimestampType {
		if c.nsqdCoord != nil {
			l, queueOffset, cnt, err = c.nsqdCoord.SearchLogByMsgTimestamp(ch.GetTopicName(), ch.GetTopicPart(), startFrom.OffsetValue)
		} else {
			err = errors.New("Not supported while coordinator disabled")
		}
	} else if startFrom.OffsetType == offsetSpecialType {
		if startFrom.OffsetValue == -1 {
			e := ch.GetChannelEnd()
			queueOffset = int64(e.Offset())
			cnt = e.TotalMsgCnt()
		} else {
			nsqd.NsqLogger().Logf("not known special offset :%v", startFrom)
			err = errors.New("not supported offset type")
		}
	} else if startFrom.OffsetType == offsetVirtualQueueType {
		queueOffset = startFrom.OffsetValue
		cnt = 0
		if c.nsqdCoord != nil {
			l, queueOffset, cnt, err = c.nsqdCoord.SearchLogByMsgOffset(ch.GetTopicName(), ch.GetTopicPart(), queueOffset)
		} else {
			err = errors.New("Not supported while coordinator disabled")
		}
	} else if startFrom.OffsetType == offsetMsgCountType {
		if c.nsqdCoord != nil {
			l, queueOffset, cnt, err = c.nsqdCoord.SearchLogByMsgCnt(ch.GetTopicName(), ch.GetTopicPart(), startFrom.OffsetValue)
		} else {
			err = errors.New("Not supported while coordinator disabled")
		}
	} else {
		nsqd.NsqLogger().Logf("not supported offset type:%v", startFrom)
		err = errors.New("not supported offset type")
	}
	if err != nil {
		nsqd.NsqLogger().Logf("failed to search the consume offset: %v, err:%v", startFrom, err)
		return 0, 0, err
	}
	nsqd.NsqLogger().Logf("%v searched log : %v, offset: %v:%v", startFrom, l, queueOffset, cnt)
	if c.nsqdCoord == nil {
		err = ch.SetConsumeOffset(nsqd.BackendOffset(queueOffset), cnt, force)
		if err != nil {
			if err != nsqd.ErrSetConsumeOffsetNotFirstClient {
				nsqd.NsqLogger().Logf("failed to set the consume offset: %v, err:%v", startFrom, err)
				return 0, 0, err
			}
			nsqd.NsqLogger().Logf("the consume offset: %v can only be set by the first client", startFrom)
		}
	} else {
		err = c.nsqdCoord.SetChannelConsumeOffsetToCluster(ch, queueOffset, cnt, force)
		if err != nil {
			if coordErr, ok := err.(*consistence.CommonCoordErr); ok {
				if coordErr.IsEqual(consistence.ErrLocalSetChannelOffsetNotFirstClient) {
					nsqd.NsqLogger().Logf("the consume offset: %v can only be set by the first client", startFrom)
					return queueOffset, cnt, nil
				}
			}
			nsqd.NsqLogger().Logf("failed to set the consume offset: %v (%v:%v), err: %v ", startFrom, queueOffset, cnt, err)
			return 0, 0, err
		}
	}
	return queueOffset, cnt, nil
}
func (self *NsqdCoordinator) FinishMessageToCluster(channel *nsqd.Channel, clientID int64, clientAddr string, msgID nsqd.MessageID) error {
	topicName := channel.GetTopicName()
	partition := channel.GetTopicPart()
	coord, checkErr := self.getTopicCoord(topicName, partition)
	if checkErr != nil {
		return checkErr.ToErrorType()
	}

	var syncOffset ChannelConsumerOffset
	changed := false
	var confirmed nsqd.BackendQueueEnd
	if channel.IsOrdered() {
		if !coord.GetData().IsISRReadyForWrite() {
			coordLog.Warningf("topic(%v) finish message ordered failed since no enough ISR", topicName)
			coordErrStats.incWriteErr(ErrWriteQuorumFailed)
			return ErrWriteQuorumFailed.ToErrorType()
		}

		confirmed = channel.GetConfirmed()
	}
	// TODO: maybe use channel to aggregate all the sync of message to reduce the rpc call.

	doLocalWrite := func(d *coordData) *CoordErr {
		offset, cnt, tmpChanged, localErr := channel.FinishMessage(clientID, clientAddr, msgID)
		if localErr != nil {
			coordLog.Infof("channel %v finish local msg %v error: %v", channel.GetName(), msgID, localErr)
			changed = false
			return &CoordErr{localErr.Error(), RpcNoErr, CoordLocalErr}
		}
		changed = tmpChanged
		syncOffset.VOffset = int64(offset)
		syncOffset.VCnt = cnt
		return nil
	}
	doLocalExit := func(err *CoordErr) {}
	doLocalCommit := func() error {
		channel.ContinueConsumeForOrder()
		return nil
	}
	doLocalRollback := func() {
		if channel.IsOrdered() && confirmed != nil {
			coordLog.Warningf("rollback channel confirm to : %v", confirmed)
			// reset read to last confirmed
			channel.SetConsumeOffset(confirmed.Offset(), confirmed.TotalMsgCnt(), true)
		}
	}
	doRefresh := func(d *coordData) *CoordErr {
		return nil
	}
	doSlaveSync := func(c *NsqdRpcClient, nodeID string, tcData *coordData) *CoordErr {
		if !changed || channel.IsEphemeral() {
			return nil
		}
		var rpcErr *CoordErr
		if channel.IsOrdered() {
			// if ordered, we need make sure all the consume offset is synced to all replicas
			rpcErr = c.UpdateChannelOffset(&tcData.topicLeaderSession, &tcData.topicInfo, channel.GetName(), syncOffset)
		} else {
			c.NotifyUpdateChannelOffset(&tcData.topicLeaderSession, &tcData.topicInfo, channel.GetName(), syncOffset)
		}
		if rpcErr != nil {
			coordLog.Infof("sync channel(%v) offset to replica %v failed: %v, offset: %v", channel.GetName(),
				nodeID, rpcErr, syncOffset)
		}
		return rpcErr
	}
	handleSyncResult := func(successNum int, tcData *coordData) bool {
		// we can ignore the error if this channel is not ordered. (just sync next time)
		if successNum == len(tcData.topicInfo.ISR) || !channel.IsOrdered() {
			return true
		}
		return false
	}
	clusterErr := self.doSyncOpToCluster(false, coord, doLocalWrite, doLocalExit, doLocalCommit, doLocalRollback,
		doRefresh, doSlaveSync, handleSyncResult)
	if clusterErr != nil {
		return clusterErr.ToErrorType()
	}
	return nil
}